Improvement in systems of ventilation



A. B.TBR0WN.

SYSTEM oF VENTILATION.

Patented 0cb.3,1876.

Wi tn ess es nefen fo r; A622074 grow/fz.

VUNITEID STATES AARON B. BROWN, OE WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN svsTEMs oF VENTILATION.

Specification forming part of Letters Patent No. IS2,746, datedOctober-1.` 3, 1876; application led June 11, i875.

To all whom it may concern:

Be it'known that I, AARON B. BROWN, of the city and county of Worcester,State of Massachusetts, have invented an Improved words, make a completechange of air as loften as may be desired. It can be used with eitherradiated heat or heated air, or both, as a means of warming, and isapplicable to any space needing ventilation. Its nature is shown in thesubjoined description of its apf plication to various rooms.

In the accompanying drawings, Figure l shows a section of a room :fittedwith devices illustrating the application and working of my invention,Fig. 2 showing a plan of the b'edframe or draft-chamber adapted tohospitals, the same letters indicating similar parts wherever theyoccur.

A A A are the draft or exhaust flues, connecting with` the base-chamberB. This chamber is made back of the common base-board,

. which I raise a little from the iioor to make a passage into thechamber all along the base, or by using a capmolding a little above thebase, as shown, I accomplish the same endopening a general draft nearthe bottom of the room-andfin large rooms I make use of the pillars D bymaking them hollow, and connected at the top to the exhaust or draft,

, and forming openings at their bases, and thus make the exhaustgeneral.

In each of the exhaust-fines A I put a reverse-valve, C, hung on a pivotto turn easily, and weighted on one side so as to remain open, as shown,during the regular draft outward, and on any change or reversal of thecurrent to close at once, (as shown in broken lines,) preventing anyinward flow through these flues.

At M is shown a platform with chamber lunder it, upon which, inhospitals, a cot may be placed; the chamber under the platform to havefree opening round it, and a connection with the exhaust-flue A, Fig. 2showing a plan of the saine, with a portion of the top removed.

By flue A a gentle draft will be established at the lower part oftheroom sufficient to draw off as much air as may be necessary. I feed in`the fresh air at or near the top, making a cham,-

gusts or sudden currents, hanging the valves on pivots to turn easily,and weighting one side so as to hang, as shown, during the regular draftinward, and on any sudden flow to close, as shown in broken lines, andremain so until the gustor pressure passes, when they Open of their Ownaccord, working automatically. Should the closing of the valves be noisythey may be cushioned with rubber or other soft substance. The Vvalves Eserve as safety-valves, preventing any outflow when the valves in A Aare shut.

In large rooms I put a feed-flue, N, leading to the center-piece Gr, andgive free discharge all round its` edge. For halls, churches, Sto., Imake a passagealong the beams, king-posts, or moldings, as L, L', andK,connecting it to feed-fines, as at It, and making numerous feedapertures its entir'e length.. By these means I am enabled to give adiffused distribution to the infed fresh air, and admit it in a largequantity, if necessary, imperceptibly, and in accord with the exhaust onthe lower part.

In ventilatinglarge rooms, orwhere a strong draft is necessary, theflues A A A may connect to one, and the draft be increased by heat ormechanical action, the entrance of the fresh air being controlled by theexhaust of the foul.

I am aware that draft-flues Opening directly ATEN Frio.

to different parts of a room are in use. These I do not claim.

What I claim as my invention is l. The arrangement and combination ofthe lues A A, drawing the air from the bottom of the room through thechamber behind the base-board B, said chamber having a general openconnection to the room, and the direct inlet-f1ues I K With theirdi'used distribution, as above set forth and described.

2. The direct inlet-dues I K, having the gust-valvesG', in combinationwith the chamber behind the cornice F, or passages L, L',

and K, through beams, 85e., of large rooms, as in churches and halls,for diffusing theinflowing air in the manner and for the purposesdescribed.

3. The chambered platform M, with its openings, in combination with theexhaust-dues A and feed-tides I, substantially as described.

4. The combination of the gust-valves G with the feed-dues,substantially as described.

AARON B. BROWN. Witnesses:

DANE. GREEN, GEO. BROWN.

